SynthesisRevista da Associacao Medica Brasileira (1992)2024
Natural supplementation to effectively treat cancer-induced fatigue: evidence of a meta-analysis on the use of guaraná.
Synthesis in Revista da Associacao Medica Brasileira (1992), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
2 citing papers in PubMed.
- Efficacy of Phytotherapy for Cancer-Related Fatigue: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.Diseases (Basel, Switzerland) · 2026Review
- Cancer Prevention and Therapy With Nutritional Science: Addressing the Gap in Medical Education and Practice.MedComm · 2025Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundCancer-related fatigue is a pervasive symptom, affecting up to 90% of cancer patients throughout their illness, and can persist well after treatment has ended. Despite its prevalence, no definitive evidence-based treatment exists, leading to an abundance of proposed alternatives, including natural supplements. To further explore the potential effects of guaraná on cancer-related fatigue, a systematic review with meta-analysis was conducted and registered on the International Prospective Register of Systematic Reviews (CRD42023484144).
methodsA thorough search of PubMed/MEDLINE and Cochrane Library was conducted using MeSH terms and related keywords for cancer-related fatigue and guaraná. Eligible studies were selected according to predetermined criteria and assessed for quality in accordance with the Cochrane Handbook for Systematic Reviews of Interventions. Data extraction was independently performed by two reviewers, with any discrepancies resolved by a third researcher.
resultsIn total, 4 full articles and 1 abstract, encompassing a total of 229 patients from 2009 to 2023, were included in the meta-analysis. Despite high heterogeneity between studies (I2=78%, ꭓ2=18.51, df=4, p=0.0010), the analysis revealed a significant benefit of using guaraná to alleviate cancer-related fatigue, with a standard mean difference of -0.77 (95%CI -1.34, -0.21) and a test for the overall effect of Z=2.68 (p=0.007).
conclusionThis meta-analysis provides support for the use of guaraná in the treatment of cancer-related fatigue. However, further investigation through larger prospective randomized controlled trials is necessary to validate these findings.
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Registered trials
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